User Manual

SCSI Commands Reference Manual, Rev. J 360
www.seagate.com Parameters for direct access devices
LOSS OF DWORD SYNCHRONIZATION COUNT field
The LOSS OF DWORD SYNCHRONIZATION COUNT field indicates the number of times the phy has restarted the link reset
sequence because it lost dword synchronization (see SPL-3 r02, Section 5.13) (i.e., the SP state machine transitioned from
SP15:SAS_PHY_Ready or SP22:SATA_PHY_Ready to SP0:OOB_COMINIT (see SPL-4). The count shall stop at the maximum value.
The LOSS OF DWORD SYNCHRONIZATION COUNT field is set to a vendor-specific value after power on.
PHY RESET PROBLEM COUNT field
The PHY RESET PROBLEM COUNT field indicates the number of times a phy reset problem (see SPL-3 r02, Section 5.10.4.2.4)
occurred. The count shall stop at the maximum value. The PHY RESET PROBLEM COUNT field is set to a vendor-specific value
after power on.
PHY EVENT DESCRIPTOR LENGTH field
The PHY EVENT DESCRIPTOR LENGTH field indicates the number of bytes in the phy event descriptor (see SPL-3 r02, Section
9.4.3.14.4).
NUMBER OF PHY EVENT DESCRIPTORS field
The NUMBER OF PHY EVENT DESCRIPTORS field indicates the number of phy event descriptors in the phy event descriptor list.
Each PHY EVENT DESCRIPTOR follows the format defined for the SMP REPORT PHY EVENT function in (see SPL-3 r02, Section
9.4.3.14.4).
5.2.17.1 Phy event descriptor
Table 339 defines the phy event descriptor.
PHY EVENT SOURCE field
The PHY EVENT SOURCE field, defined in SAS-3, indicates the type of phy event being reported in the PHY EVENT field.
PHY EVENT field
The PHY EVENT field indicates the value (i.e., the count or peak value detected) of the phy event indicated by the PHY EVENT
SOURCE field.
PEAK VALUE DETECTOR THRESHOLD field
If the phy event source is a peak value detector, then the PEAK VALUE DETECTOR THRESHOLD field indicates the value of the
peak value detector that causes the expander device to originate a Broadcast (Expander) (see SAS-3). If the phy event source is
not a peak value detector, then the PEAK VALUE DETECTOR THRESHOLD field is reserved.
Table 339 Phy event descriptor
Bit
Byte
7 6 5 4 3 2 1 0
0
Reserved. . .
2
3 PHY EVENT SOURCE
4 (MSB)
PHY EVENT. . .
7 (LSB)
8 (MSB)
PEAK VALUE DETECTOR THRESHOLD. . .
11 (LSB)